CN111855076B - Packaging mechanism for pressure sensor chip packaging test and packaging method thereof - Google Patents
Packaging mechanism for pressure sensor chip packaging test and packaging method thereof Download PDFInfo
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- CN111855076B CN111855076B CN202010725028.7A CN202010725028A CN111855076B CN 111855076 B CN111855076 B CN 111855076B CN 202010725028 A CN202010725028 A CN 202010725028A CN 111855076 B CN111855076 B CN 111855076B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/148—Details about the circuit board integration, e.g. integrated with the diaphragm surface or encapsulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2896—Testing of IC packages; Test features related to IC packages
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2851—Testing of integrated circuits [IC]
- G01R31/2898—Sample preparation, e.g. removing encapsulation, etching
Abstract
The invention discloses a packaging mechanism for a pressure sensor chip packaging test and a packaging method thereof.A cover plate is provided with two injection molding parts on the surface, and also comprises a first linkage part, a second linkage part and a third linkage part. The invention has the effects that the packaging of the pressure sensor chip can be realized by upwards breaking the two limiting columns, the packaging is convenient and fast, and meanwhile, the silicone gel can be injected into the cover plate through the injection molding channel, so that the periphery of the sensor chip is filled, the effect of sealing and protecting the sensor chip is achieved, and the silicone gel can be ensured to fill the inner cavity of the cover plate.
Description
Technical Field
The invention relates to the technical field of chip packaging, in particular to a packaging mechanism for pressure sensor chip packaging test and a packaging method thereof.
Background
The pressure sensor senses pressure signals through the pressure sensing unit, converts the pressure signals into usable output electric signals according to a certain rule, and processes the usable output electric signals into a corresponding required analog output or digital output form through the signal processing unit.
As the pressure sensor medium isolation packaging structure disclosed in the cited document chinese patent CN201310123972.5, published: 20141015, the citation document includes a tube seat, a tube cap, a pressure sensor chip, a substrate and a fluid tube, the tube seat is provided with a through hole and fixed above the substrate, the pressure sensor chip is pasted on the tube seat and covers the through hole, the pressure sensor chip includes a back cavity communicated with the through hole, the tube cap is covered above the tube seat so as to form a closed cavity between the tube cap and the tube seat, the fluid tube is connected below the tube seat and is provided with a channel communicated with the through hole, the pressure sensor chip of the invention is directly pasted on the tube seat, the pressure back cavity is directly contacted with the fluid to be measured through the fluid tube, a series of complex process such as oil filling and other medium isolation technology is omitted, and the structure is more compact.
However, although this citation document omits other medium isolation techniques such as a series of complex processes such as oil filling, the structure is more compact, but in the process of packaging the pressure sensor chip, after the sensor chip and the copper nut are bonded on the tube seat, the sensor chip and the PCB need to be electrically connected in sequence, the PCB and the tube seat are fixedly connected, and the cover plate and the tube seat are fixedly connected, the packaging process is troublesome, and after the silicone gel is filled around the sensor chip, when the cover plate and the tube seat are fixedly connected, a gap exists between the silicone gel and the cover plate, so that the silicone gel is prone to shaking, and the sensor chip wrapped by the silicone gel is affected.
Disclosure of Invention
The invention aims to provide a packaging mechanism for a pressure sensor chip packaging test and a packaging method thereof, which have the effects of realizing the electric connection between a sensor chip and a conductive plate, the fixed connection between a cover plate and a base plate and the fixed connection between a PCB (printed circuit board) and a copper nut by upwards breaking two limiting columns, being convenient and fast to package, simultaneously, injecting silica gel into the cover plate through an injection molding channel so as to fill the periphery of the sensor chip, thereby playing a sealing protection effect on the sensor chip, ensuring that the inner cavity of the cover plate can be filled with the silica gel, solving the problem that the packaging process is troublesome in the current pressure sensor chip packaging process, and after the periphery of the sensor chip is filled with the silica gel, when the cover plate is fixedly connected with a tube seat, gaps exist between the silica gel and the cover plate, thereby enabling the silica gel to easily shake, thereby affecting the problem that the sensor chip is wrapped by the silica gel.
In order to achieve the purpose, the invention provides the following technical scheme: a packaging mechanism for pressure sensor chip package test, including base plate, copper nut, apron and PCB board, sensor chip fixed mounting be in the upper surface of base plate, copper nut fixed mounting be in the lower surface of base plate, the surface of apron is provided with two injection molding.
Still include linkage portion one, linkage portion two and linkage portion three, through the injection molding, and under the effect of linkage portion one, drive sensor chip with electricity is connected between the PCB board, through the injection molding, and linkage portion one with under the combined action of linkage portion two, drive the apron with fixed connection between the base plate, through the injection molding, and linkage portion one with under the combined action of linkage portion three, drive the copper nut with fixed connection between the PCB board.
Preferably, the injection molding is including rotating the connection and being in the rotary column of apron plate body wall, the fixed surface of rotary column is connected with and supports the compression leg, the surface of rotary column with the surface that supports the compression leg all sets up the way of moulding plastics that communicates each other.
Preferably, the first linkage part comprises a limiting column fixedly connected to the surface of the rotary column and first sliding grooves formed in two sides of the base plate, the base plate is connected with a sliding plate through the first sliding grooves in a sliding manner, conductive rods are fixedly connected to the plate body wall of the sliding plate, springs are fixedly connected to two opposite sides of the sliding plate, opposite ends of the two springs are fixedly connected with the plate body wall of the base plate, conductive plates are fixedly connected to the upper ends of the two conductive rods, each conductive plate comprises a butting surface, second sliding grooves are formed in two sides of the PCB, lead electrodes are slidably connected to the PCB through the second sliding grooves, through holes for the conductive rods to pass through are formed in the surfaces of the lead electrodes, through grooves for the conductive rods to pass through are formed in the surfaces of the base plate and the PCB, and two gold threads are arranged on the surface of the sensor chip, the end parts of the two gold wires are respectively placed on the two butting surfaces.
Preferably, the linkage part II comprises two pinch plates which are fixedly connected to the surfaces of the two sliding plates respectively.
The cover plate comprises a buckling end used for being buckled and connected to the base plate.
Preferably, the linkage part III comprises two insertion plates fixedly connected to the opposite sides of the two lead electrodes respectively, and the surface of the copper nut is provided with a slot for inserting the insertion plates.
Preferably, the sliding plate covers the notch of the through groove in the base plate.
The invention also provides a packaging method as follows: the packaging method of the packaging mechanism for the pressure sensor chip packaging test comprises the following steps:
s1: bonding a sensor chip on the upper surface of a substrate, bonding a copper nut on the lower surface of the substrate, bonding the upper surface of a PCB on the lower surface of the substrate, and simultaneously fastening and installing a cover plate on the substrate;
s2: through the injection molding piece, under the combined action of the first linkage part, the second linkage part and the third linkage part, the sensor chip is driven to be electrically connected with the PCB, the cover plate is fixedly connected with the substrate, and the copper nut is fixedly connected with the PCB;
s3: and filling the cover plate with silicone gel through the injection molding piece.
Compared with the prior art, the invention has the following beneficial effects:
firstly, the upper surface of the PCB is attached to the lower surface of the substrate, the conducting rod penetrates through the through hole in the process, the cover plate is buckled and mounted on the substrate through the buckling end and is in the state shown in figure 2, and then the two limiting columns are pulled upwards, so that the electric connection between the sensor chip and the conducting plate, the fixed connection between the cover plate and the substrate and the fixed connection between the PCB and the copper nut can be realized, and the packaging is convenient and quick.
Secondly, after the surface of the limiting column is attached to the surface of the cover plate, as shown in fig. 4, under the action of the elastic restoring force of the compressed spring, the current-conducting plate is subjected to the elastic restoring force in the direction of the abutting column, so that the end part of the abutting column is abutted by the current-conducting plate, the clamping effect on the gold thread is realized, and the phenomenon that the surface of the gold thread is separated from the abutting surface is avoided.
And thirdly, injecting the silicone gel into the cover plate through the injection molding channel so as to fill the silicone gel to the periphery of the sensor chip, thereby playing a role in sealing and protecting the sensor chip and ensuring that the silicone gel can fill the inner cavity of the cover plate.
Drawings
FIG. 1 is a first state diagram of the structure of the present invention and is taken as a front view;
FIG. 2 is a second state diagram of the structure of the present invention;
FIG. 3 is a third state diagram of the structure of the present invention;
fig. 4 is an enlarged view of the structure of fig. 3 according to the present invention.
In the figure: the sensor comprises a sensor chip 1, a base plate 2, a copper nut 3, a cover plate 4, a PCB 5, a rotary column 6, a pressing column 7, an injection molding channel 8, a limiting column 9, a sliding plate 10, a conductive rod 11, a spring 12, a conductive plate 13, a butting surface 14, a lead electrode 15, a through hole 16, a gold thread 17, a buckle plate 18, a buckling end 19, a plug plate 20 and a slot 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problems that the packaging process is troublesome in the packaging process of the conventional pressure sensor chip, and when the cover plate and the tube seat are fixedly connected after the sensor chip is filled with the silicone gel, a gap exists between the silicone gel and the cover plate, so that the silicone gel is easy to shake, and the sensor chip is wrapped by the silicone gel, please refer to fig. 1 to 4, the invention provides a technical scheme: the packaging mechanism for the pressure sensor chip packaging test comprises a base plate 2, a copper nut 3, a cover plate 4 and a PCB 5, wherein the base plate 2 is equivalent to a tube seat in a background art citation document, the innovation point of the invention is not directed to the base plate 2, the copper nut 3, the cover plate 4 and the PCB 5, further the invention is not described in detail herein, the sensor chip 1 is fixedly arranged on the upper surface of the base plate 2, the copper nut 3 is fixedly arranged on the lower surface of the base plate 2, two injection molding parts are arranged on the surface of the cover plate 4, when the packaging mechanism is used, the sensor chip 1 is adhered to the upper surface of the base plate 2, the copper nut 3 is adhered to the lower surface of the base plate 2, then the upper surface of the PCB 5 is adhered to the lower surface of the base plate 2, meanwhile, the cover plate 4 is buckled and arranged on the base plate 2 to be in a state shown in figure 2, a linkage part I, a linkage part II and a linkage part III are further included, and through the injection molding parts, and under the effect of linkage portion one, drive the sensor chip 1 and electrically connect between PCB board 5, through the injection molding, and under the combined action of linkage portion one and linkage portion two, drive fixed connection between apron 4 and base plate 2, through the injection molding, and under the combined action of linkage portion one and linkage portion three, drive fixed connection between copper nut 3 and PCB board 5, finally mould plastics silica gel in to apron 4 through the injection molding, thereby fill to around sensor chip 1, and then play the effect of sealed protection to sensor chip 1.
Further, the injection molding is including rotating the rotary column 6 of connecting at the 4 board walls of apron, and the fixed surface of rotary column 6 is connected with and supports the compression leg 7, and the surface of rotary column 6 and the surface that supports compression leg 7 all set up the 8 of saying that moulds plastics that communicate each other, say 8 through moulding plastics and to the silica gel of moulding plastics in apron 4 to fill around to sensor chip 1, and then play the effect of sealed protection to sensor chip 1, and guaranteed that the silica gel can fill up apron 4 inner chambers.
Further, one linkage part comprises a limiting column 9 fixedly connected to the surface of the rotary column 6, and first sliding grooves formed in two sides of the substrate 2, the substrate 2 is slidably connected with a sliding plate 10 through the first sliding groove, the plate body wall of the sliding plate 10 is fixedly connected with a conducting rod 11, opposite sides of the two sliding plates 10 are fixedly connected with springs 12, opposite ends of the two springs 12 are fixedly connected with the plate body wall of the substrate 2, upper ends of the two conducting rods 11 are fixedly connected with a conducting plate 13, the conducting plate 13 comprises a butting surface 14, two sides of the PCB 5 are respectively provided with a second sliding groove, the PCB 5 is slidably connected with a lead electrode 15 through the second sliding groove, a through hole 16 for the conducting rod 11 to pass through is formed in the surface of the lead electrode 15, through grooves for the conducting rod 11 to pass through are formed in the surfaces of the substrate 2 and the PCB 5, two gold threads 17 are arranged on the surface of the sensor chip 1, end parts of the two gold threads 17 are respectively lapped on the two butting surfaces 14, the two limiting posts 9 are pulled upwards to drive the two rotating posts 6 to rotate, the two rotating posts 6 rotate to drive the two pressing posts 7 to rotate, because the end parts of the pressing posts 7 in the figure 2 are abutted against the abutting surfaces 14, the gold wires 17 are overlapped on the abutting surfaces 14, then the end parts of the pressing posts 7 are abutted against the surfaces of the gold wires 17 at the same time, as the pressing posts 7 rotate, on one hand, the conductive plates 13 are abutted against and pressed to drive the two conductive plates 13 to move towards opposite directions, on the other hand, the end parts of the pressing posts 7 press the gold wires 17 downwards along the surfaces of the abutting surfaces 14, so that the surfaces of the gold wires 17 are tightly attached to the abutting surfaces 14, the electric connection between the gold wires 17 and the conductive plates 13 is realized, and as the conductive rods 11 penetrate through the through holes 16, the electric connection among the gold wires 17, the conductive plates 13, the conductive rods 11 and the lead electrodes 15 is realized, so that the sensor chip 1 can sense signals through the limiting posts 17, The conducting plate 13, conducting rod 11 and lead electrode 15 transmit the outside, after the surface of spacing post 9 is laminated in the surface of apron 4, as shown in fig. 4, spring 12's elasticity restoring force effect after the compression this moment for conducting plate 13 receives the elasticity restoring force to pressing post 7 direction, makes then the tip that presses post 7 to be supported by conducting plate 13, realizes the card dead effect to gold thread 17, avoids the surface of gold thread 17 to take place to break away from the phenomenon of butt face 14.
Further, linkage portion two includes two buckle 18 of fixed connection respectively on two slide 10 surfaces, and apron 4 is including being used for the lock to connect the lock end 19 on base plate 2, moves to relative direction and through two slide 10 through two current conducting plates 13, drives two buckle 18 and detains apron 4 and be located lock end 19 department surface, can realize the fixed connection between apron 4 and the base plate 2.
Further, the third linkage part comprises two insertion plates 20 fixedly connected to the opposite sides of the two lead electrodes 15 respectively, the surface of the copper nut 3 is provided with slots 21 for inserting the insertion plates 20, and the two insertion plates 20 are driven to be inserted into the slots of the two insertion slots 21 respectively by moving the two conductive plates 13 in the opposite directions, so that the fixed connection between the PCB 5 and the copper nut 3 can be realized.
Furthermore, the sliding plate 10 shields the through groove opening on the substrate 2, and the sliding plate 10 shields the through groove opening on the substrate 2, so that the silicone gel in the cover plate 4 is prevented from leaking through the through groove opening.
Referring to fig. 1 to 4, the present invention further provides a packaging method: the packaging method of the packaging mechanism for the pressure sensor chip packaging test comprises the following steps:
s1: bonding a sensor chip 1 on the upper surface of a substrate 2, bonding a copper nut 3 on the lower surface of the substrate 2, bonding the upper surface of a PCB (printed circuit board) 5 on the lower surface of the substrate 2, and simultaneously fastening and mounting a cover plate 4 on the substrate 2;
s2: through an injection molding piece, under the combined action of the first linkage part, the second linkage part and the third linkage part, the sensor chip 1 is driven to be electrically connected with the PCB 5, the cover plate 4 is driven to be fixedly connected with the substrate 2, and the copper nut 3 is driven to be fixedly connected with the PCB 5;
s3: the cover plate 4 is filled with silicone gel by means of an injection molding.
The working principle is as follows: when the packaging mechanism for the pressure sensor chip packaging test is used, the sensor chip 1 is adhered to the upper surface of the substrate 2, then the copper nut 3 is adhered to the lower surface of the substrate 2, and then the end parts of the two gold wires 17 are respectively overlapped on the two abutting surfaces 14 and start to be in a state shown in figure 1;
attaching the upper surface of the PCB 5 to the lower surface of the substrate 2, wherein the conductive rod 11 passes through the through hole 16, and the cover plate 4 is fastened and mounted on the substrate 2 by the fastening end 19 to the state shown in fig. 2;
the two limiting posts 9 are pulled upwards to drive the two rotating posts 16 to rotate, the two rotating posts 16 rotate to drive the two pressing posts 7 to rotate, because the end parts of the pressing posts 7 in the figure 2 are abutted against the abutting surfaces 14, the gold wires 17 are overlapped on the abutting surfaces 14, then the end parts of the pressing posts 7 are abutted against the surfaces of the gold wires 17 at the same time, as the pressing posts 7 rotate, on one hand, the conductive plates 13 are abutted against and pressed to drive the two conductive plates 13 to move towards opposite directions, on the other hand, the end parts of the pressing posts 7 press the gold wires 17 downwards along the surfaces of the abutting surfaces 14, so that the surfaces of the gold wires 17 are tightly attached to the abutting surfaces 14, the electric connection between the gold wires 17 and the conductive plates 13 is realized, and as the conductive rods 11 penetrate through the through holes 16, the electric connection among the gold wires 17, the conductive plates 13, the conductive rods 11 and the lead electrodes 15 is realized, so that the sensor chip 1 can sense signals through the through holes 17, The conductive plate 13, the conductive rod 11 and the lead electrode 15 are transmitted to the outside, and after the surface of the limiting column 9 is attached to the surface of the cover plate 4, as shown in fig. 4, under the action of the elastic restoring force of the compressed spring 12, the conductive plate 13 is subjected to the elastic restoring force towards the direction of the abutting column 7, so that the end part of the abutting column 7 is abutted by the conductive plate 13, the clamping effect on the gold wire 17 is realized, and the phenomenon that the surface of the gold wire 17 is separated from the abutting surface 14 is avoided;
the two current-conducting plates 13 move towards the opposite direction and drive the two pinch plates 18 to buckle the surface of the cover plate 4 at the buckling end 19 through the two sliding plates 10, so that the cover plate 4 is fixedly connected with the base plate 2;
the two current-conducting plates 13 move towards the opposite direction to drive the two inserting plates 20 to be respectively inserted into the grooves of the two inserting grooves 21, so that the fixed connection between the PCB 5 and the copper nut 3 is realized;
and finally, injecting silicone gel into the cover plate 4 through the injection molding channel 8, so that the silicone gel is filled to the periphery of the sensor chip 1, the effect of sealing and protecting the sensor chip 1 is achieved, and the silicone gel can be ensured to fill the inner cavity of the cover plate 4.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A packaging mechanism for pressure sensor chip package test, including base plate (2), copper nut (3), apron (4) and PCB board (5), sensor chip (1) fixed mounting be in the upper surface of base plate (2), copper nut (3) fixed mounting be in the lower surface of base plate (2), its characterized in that: the surface of the cover plate (4) is provided with two injection molding parts;
the sensor chip is characterized by further comprising a first linkage part, a second linkage part and a third linkage part, wherein the sensor chip (1) is driven to be electrically connected with the PCB (5) through the injection molding part under the action of the first linkage part, the cover plate (4) and the substrate (2) are driven to be fixedly connected through the injection molding part under the combined action of the first linkage part and the second linkage part, and the copper nut (3) and the PCB (5) are driven to be fixedly connected through the injection molding part under the combined action of the first linkage part and the third linkage part;
the injection molding is connected including rotating rotary column (6) of apron (4) plate body wall, the fixed surface of rotary column (6) is connected with and supports compression leg (7), the surface of rotary column (6) with the surface that supports compression leg (7) all sets up the way (8) of moulding plastics that communicate each other.
2. The packaging mechanism for pressure sensor chip package testing of claim 1, wherein: one linkage part comprises a limiting column (9) fixedly connected to the surface of the rotary column (6) and a first sliding groove arranged on two sides of the base plate (2), the base plate (2) is connected with a sliding plate (10) through the first sliding groove in a sliding manner, the plate body wall of the sliding plate (10) is fixedly connected with a conductive rod (11) and two springs (12) are fixedly connected to the opposite sides of the sliding plate (10), the opposite ends of the springs (12) are fixedly connected with the plate body wall of the base plate (2), the upper ends of the conductive rods (11) are fixedly connected with conductive plates (13), the conductive plates (13) comprise abutting surfaces (14), two sliding grooves are formed in two sides of the PCB (5), the PCB (5) is connected with lead electrodes (15) through the two sliding grooves in a sliding manner, through holes (16) for the conductive rods (11) to pass through are formed in the surface of the lead electrodes (15), the surface of base plate (2) with the surface of PCB board (5) is all offered and is used for lead to groove that conducting rod (11) passed, the surface of sensor chip (1) is provided with two gold threads (17), two the tip of gold thread (17) is taken respectively and is put two on butt face (14).
3. The packaging mechanism for pressure sensor chip package testing of claim 2, wherein: the linkage part II comprises two pinch plates (18) which are respectively and fixedly connected with the surfaces of the two sliding plates (10);
the cover plate (4) comprises a buckling end (19) which is used for being buckled and connected with the base plate (2).
4. A packaging mechanism for pressure sensor chip package testing according to claim 2 or 3, characterized in that: the third linkage part comprises two insertion plates (20) fixedly connected to the opposite sides of the two lead electrodes (15), and a slot (21) for inserting the insertion plate (20) is formed in the surface of the copper nut (3).
5. A packaging mechanism for pressure sensor chip package testing according to claim 2 or 3, characterized in that: the sliding plate (10) shields the notch of the through groove on the base plate (2).
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| CN114397059B (en) * | 2022-01-18 | 2022-07-29 | 凯晟动力技术（嘉兴）有限公司 | EGR (exhaust gas recirculation) corrosion-resistant pressure sensor packaging device and application method thereof |
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